You complain that God is invisible; but, the fault is yours, not to recognize God in all His various manifestations. When the heart is pure, the Lord is revealed. God knows and God will deal with you, as you deserve. Have faith in that. Repent for all wrongs done and resolve not to repeat the mistake; then God will extend His grace.
(From : Sai Veda, The Word of God, sayings of Bhagavan Sri Sathya Sai Baba)