Unthankfulness mars the course of divine communications; but to the thankful it is opened, Phil. 4:6. Ingratitude among men provokes the liberal person to withhold his hand; and so does it provoke the holy God, the giver of all good, to restrain his favours. Alas! it is more natural to us to ask than to give thanks. Among ten seekers (the lepers), whom Christ cured of a very inveterate disease, there was but one thanker; and he is specially noticed in the gospel history. We should never beg a mercy from the Lord without heartily thanking him for all we have formerly received, as this is the ready way to procure more.
~Thomas Boston, Works, 2:537-538
Source: http://www.puritanboard.com/f25/more-natural-us-ask-than-give-thanks-83226/, Comment #1 (Thank You, Reverend Winzer!)
Photo: Rest and Be Thankful by Simon Johnston (click photo for more details)