At the heart of science is an essential tension between two seemingly contradictory attitudes - an openness to new ideas, no matter how bizarre or counterintuitive they may be, and the most ruthless skeptical scrutiny of all ideas, old and new. This is how deep truths are winnowed from deep nonsense.
Philosophy begins when one learns to doubt - particularly to doubt one's cherished beliefs, one's dogmas and one's axioms.
First, realize that it is necessary for an intelligent person to reflect on the words that are spoken, not the person who says them. If the words are true, he will accept them whether he who says them is a known truth teller or a liar. One can extract gold from a lump of dirt. Medication from the venom of a snake…For an intelligent person, wisdom is like a lost sheep which is sought, and can be found anywhere and in any individual.
You say that you love rain, but you open your umbrella when it rains... You say that you love the sun, but you find a shadow spot when the sun shines... You say that you love the wind, But you close your windows when wind blows... This is why I am afraid; You say that you love me too...