Athletes hoping to win an Olympic medal train long hours every day for years. I know musicians who live for music; if you take away their music, they'd rather die. Then there are high school students who set their minds on entering Harvard or Stanford, and business persons determined to make a fortune before they are 30 or 40. Such single-mindedness, such determination, such dedication! But to whom will the Olympic medal be awarded? When life is over, will your music still be around? Will Harvard or Stanford and making a fortune make you truly happy? If you want to do all these things without involving God, then I'd say that you are basically self-centered.
Jesus wants us to love our God with all our heart, with all our soul, with all our mind, and with all our strength ~ here is the best assignment for us! Replace all your worldly goals with loving God and you'll never regret the outcome.