Big prayers? (Quote from John Newton)

I was online watching a talk and panel session from Desiring God conference, both of which had lots of good and challenging stuff. One of the things I found especially convicting and uplifting was the call to prayer and to trust in the power of our God (rather than our plans, schemes, theology, "slickness", technique, control, charisma, facilities, etc etc, whatever you want to add to the list...). During the panel session Jason Meyer quoted these words from a hymn by John Newton:

Thou art coming to a King,
Large petitions with thee bring;
For His grace and power are such,
None can ever ask too much

Our God is not too small. May our prayers not be too small either.