The Lord can be pleased only by a humble attitude in the service spirit. The more we render service unto the Lord under the direction of the spiritual master, the more we make advancement on the path approaching the Lord. We cannot demand any grace or mercy from the Lord because of our service rendered to Him. He may accept or not accept our service, but the only means to satisfy the Lord is through the service attitude, and nothing else.

From Srila Prabhupada’s “Krsna” book ch. 58: Five Queens Married by Krsna