"Then shall thy light break forth as the morning, and thine health shall spring forth speedily: and thy righteousness shall go before thee; the glory of the Lord shall be thy reward. Then shalt thou call, and the Lord shall answer; thou shalt cry, and he shall say, HERE I AM..."
When you go to God with the right purpose and right intentions, in your time of need He will be standing there saying HERE I AM. Maybe you have some situations going on in your life, remember, God is there saying HERE I AM. Maybe you have some pains, God is saying HERE I AM. Maybe people are mistreating you, God is saying HERE I AM.
When you cry out to the Lord the Lord will answer and say HERE I AM. Whatever is going on in your life if you cry out to God he will answer. Just like a mother taking her child saying "Here I am. What is that you want? What is it that you need? What is it that you desire?" God will supply your every need according to His riches and glory. HERE I AM.