Practicing yoga is half the battle. Even if you don't feel enthusiastic in the beginning, if you go on practicing you will come to feel that tremendous longing for God which is necessary if you are to find Him.
Why don't you make the effort? Whence do all the beautiful things in creation continually emerge? Whence comes the intelligence of great souls, but from the storehouse of the Infinite Spirit? And if these wonders you see about you are not enough to induce you to seek Him, why should He reveal Himself to you? He has given you the capacity for love that you may yearn for Him above all else. Don't misuse your love and reason. And don't misuse your concentration and intelligence on false goals.