Teachings from the world are profitable, but we must understand that they are originally God's grace and because of our human fallibility after Adam's corruption, these teachings are not really perfect.
Therefore, only through Christ, who is unfallible, can be our way to perfection. He is the Way, the Truth and the Life.
For a little example, playing chess, can actually help one to realize or measure how good one's mentality is, able to also see that different people have different mentality, able to see how dumb some really are at logical decisions, and more importantly, how smarter others are than oneself. Therefore one should learn to be humble, not proud. And learn to help others to enlighten their thinking process.
However, chess could be an obsessive bad hobby. And mixing with pride, it could bring down one's life. Such as Wilhelm Steinitz who thought he could beat God in chess. And when one think that chess is life, it will consume one's precious time on Earth.
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