"The most beautiful experience we can have is the mysterious. It is the fundamental emotion that stands at the cradle of true art and true science." 

Albert Einstein, The World as I See It, 1931

"The most beautiful experience we can have is the mysterious. It is the fundamental emotion that stands at the cradle of true art and true science." 

Albert Einstein, The World as I See It, 1931

There are some scientists who are realistic as well as superstitious some times. We can see a lot of scientists who are religious and practice religious rituals even if they are baseless. I have experiences with some scientists who wear certain particular colour dresses with a belief that that colour dresses will bring fortune and good results in their research or activities. I have also seen many scientists who believe in astrology and numerology.

Yes, a scientist can ask questions in the epistemology of philosophy and in the metaphysics of philosophy. The former is mostly about how through empirical test and the latter is mostly about why through mind. We can ask how do atoms split to generate enormous energy. We can ask why has splitting the atom burdened society or benefited it. Both questions, in my opinion, are suited for science. One is concrete, the other is abstract.

And yes! it is perfectly okay for a modern scientist to believe in God, just as some of the greatest thinkers who ever lived also believed in God while making enormous contributions to various fields of knowledge with empirical evidence and the formulation of laws that still stand. 

A scientist is a human with HUMAN STRENGTHS AND WEAKNESSES.  S/he has been trained to think logically about science, the matters of the physical world.  But s/he has also been exposed to family values about the spiritual world.  But we must note that certain religions (Christianity and Islam) do not allow believers to involve in astrology.  Spirituality does equate to superstition.

"“Do not turn to mediums or necromancers; do not seek them out..." Leviticus 19:31.

Maybe some scientists as well be

I do believe that a scientist is a person of reason and rational thinking. However, a scientist is a human being who lives in society and society has cultures and traditions and therefore cultures and traditions might remain as a residual to entertain themselves but not to know something irrational that will be valid and affect science and life of a person who rejects irrationality. "When you live in Rome behave like Romans"  does not say be Romans. 

Most scientists are superstitious; their science is one compartment of their personality, while the other compartment is occupied by superstitions and rationality and methods of logic have no entry there. But, some try to explain their superstitions based on some flimsy arguments that they hide behind the garb of science or logic. Of course, scientists are bounded by many of irrationalities prevalent in their respective believe systems; some break that boundaries and seems liberated 

True scientist has one face i.e. realistic, not  superstitions.

That was what I believed earlier; but after being exposed to many I realized that superstition occupy a big compartment in many of their minds; Many of their actions also reflect that.

I fail to understand what is a true scientist; is it a person who contributes to scientific knowledge, and who is amenable to questions based on scientific nationalities, or who is leading a life dominated by rationality and logic (questions are many); but I do not know

https://en.wikipedia.org/wiki/Scientist

scientist, in a broad sense, is a person engaging in a systematic activity to acquire knowledge. In a more restricted sense, a scientist may refer to an individual who uses the scientific method.[1] The person may be an expert in one or more areas of science.[2] This article focuses on the more restricted use of the word. Scientists perform research toward a more comprehensive understanding of nature, including physical, mathematical and social realms.

The defining trait of a scientist is objectivity and the use of the scientific method. From this perspective, if a researcher becomes subjective and deviates from the scientific method because of superstitions, he is no longer a scientist. But, even if he believes in the superstitious and yet remains objective and follows the scientific method, he is a scientist.

I think one of the basic quality for a scientist is willingness to question and willingness to get questions. A believer in superstitions largely lack these qualities and hence they keep two compartments in their mind - the compartment of beliefs and the compartment of rationality. And they make it a point that both do not mix. In case of chances of mixing they bring in science to help sustain their superstitions, their belief systems. They use science's finding and confusions to save their superstitions and beliefs. They try to interpret their belief system using science rightly or wrongly, mostly wrongly

But, I think one's beliefs have their influence on their logic and rationality; but in most of the empirical scientific works the influence is much less and their superstitious beliefs in many a case help them get relief from tensions and failures

Science is the great antidote to the poison of enthusiasm and superstition.

~Adam Smith, The Wealth of Nations, 1776