One of the most important things we can do in our lives on earth is to discover what is actually true—to gain a knowledge of things as they really are—and apply that to our lives. Those who are honest truth seekers know that God uses the Holy Ghost to impart truth. Through the power of the Holy Ghost they can receive a flash of revelation bringing them certainty that Joseph Smith is a prophet of God, that the Book of Mormon is true, and the Church of Jesus Christ of Latter-day Saints is the only true Church on earth.
We are living in an age of logic, reason, facts, and figures, but such things can be very harmful any time they suggest a course of action contrary to God's teachings. Satan uses logic to confuse us, but those who are led by the Holy Ghost will not be deceived. If you are troubled by what secular science teaches about so-called evolution, withhold judgment until you have learned the truths God has revealed to us in scripture. Do not take a stand against the teachings of God.
Doctrines are revealed by God and he expects us to accept them no matter what the doctrine is. We must obey God even if we don't understand the reasons for a particular doctrine. We demonstrate our faith by obeying God without knowing why. God sets the standards of right and wrong. At one point God said "Thou shalt not kill," while at another point God said, "Thou shall utterly destroy." Whatever God requires is right, no matter what it is.
When you examine the history of science, you find that one understanding of the physical world that is stoutly maintained for centuries can be discarded in favor of a new understanding that comes closer to the truth. By comparison, revealed truths are absolute and unchanging, and provide an understanding of the nature of man and his purpose in life. Secular knowledge by itself cannot save anyone's soul or bring anyone back to the presence of Heavenly Father.
It is the Holy Ghost that leads people to all truth. God reveals truths to us if we study and ponder the scriptures. But we must maintain our worthiness in order to receive revelation. God holds back from us many truths that he would reveal to people if they were more worthy. Every true philosopher, to the extent that he understands the principles of truth, has some amount of the gospel, and is a Latter-day Saint whether he knows it or not.