Beliefs depend on who you are from upbringing and experiences, confirming or contradicting teachings, and where you are in relation to the truth. Understanding and interpretation can change with growth of knowledge and spiritual insight. Prudence in making decisions needs commitment to goals with priorities in proper order. If your number one goal is salvation of self and others, then your decisions will be different than those made with self interests contrary to reaching that goal, like pleasure, wealth, control of others, or applause. Decisions need all possible information and consideration of possible effects on others to be right.
Motives are an important indication of the propriety of our acts.
They have a powerful effect on our feelings from which most of our decisions are made. It is by such acts, doing His will, that we be purified, like gold in fire, and proven worthy of God's promises and rewards. God our Creator gives us life, gifts, ability to serve, and be saved no matter where, when , or in what circumstances, culture, or environment, because Jesus died to save all people, past, present, and future. Eskimos survive in the most extreme cold, using resources available to them in their environment, as well as people in deserts and jungles on the equator, and all in between, survive with intelligence and cultural experience, as well as by His laws written in their hearts, with the same opportunities to choose right or wrong. Intelligence is where you find it.