Every one of our sinful actions has a suicidal power on the faculties that put that action forth. When you sin with the mind, that sin shrivels the rationality. When you sin with the heart or the emotions, that sin shrivels the emotions. When you sin with the will, that sin destroys and dissolves your willpower and your self-control. Sin is the suicidal action of the self against itself. Sin destroys freedom because sin is an enslaving power.
Timothy KellerTruth is more important, freedom is more complex, and Jesus is more liberating than you think.
Timothy KellerYou 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 Keller