" You can only afford to be generous if you actually have some money in the bank to give. In the same way, if your only source of love and meaning is your spouse, then anytime he or she fails you, it will not just cause grief but a psychological cataclysm. If, however, you know something of the work of the Spirit in your life, you have enough love "in the bank" to be generous to your spouse even when you are not getting much affection or kindness at the moment. "

― Timothy J. Keller , The Meaning of Marriage: Facing the Complexities of Commitment with the Wisdom of God