There is a story told about Albert Einstein. He was teaching at Princeton University in the early 50s. It just may be relevant today.
It
goes like this: Einstein had just administered an exam to an advanced
class of physics students. He was on his way back to his office. His
teaching assistant was walking with him, carrying the exam papers.
The
teaching assistant asked, "Dr. Einstein, excuse me for asking, but
wasn't this the same exam that you gave to this same class last year?"
Dr. Einstein said, "Yes, yes. It was the same exam."
The assistant then summoned his courage in the presence of the great man and asked, "Dr. Einstein, how could you give the same exam to the same class two years in a row?"
Einstein replied, "Simple. The answers have changed."
The moral of this story is that even today, the answers may have changed in virtually every field and niche — including the way you earn a living, behave, conduct yourself, choose a spouse, raise a family, protect your life and the lives of those you love, eat, travel, vote, obey the law and say your opinion to name just a few.
Life and the life of those you love is in your own hands. Using your own energy and talent to benefit others — because that benefits you and your family.
In other words, it's okay to change your mind.