Spurgeon's words do not sound selfish in the very least. If I don't strongly desire to be closer and closer to God then I am selfish. Selfish because I want to do things my way, have the kind of fun I want to have, and because I don't want to take the time to stay at Jesus' feet and learn more of Him.
If only we could all truthfully pray the words that David prayed, "O God, thou art my God; early will I seek thee: my soul thirsteth for thee, my flesh longeth for thee in a dry and thirsty land, where no water is." Psalms 63:1