Through pride the devil became the devil. Pride leads to every vice, it's the complete anti-God state of mind.
C. S. LewisMy own idea, for what it is worth, is that all sadness which is not either arising from the repentance of a concrete sin and hastening towards concrete amendment or restitution, or else arising from pity and hastening to active assistance, is simply bad; and I think we all sin by needlessly disobeying the apostolic injunction to 'rejoice' as much as by anything else. Humility, after the first shock, is a cheerful virtue.
C. S. LewisThis is where men, even the trustiest, fail us. Their heart is never so wholly given to any matter but that some trifle of a meal, or a drink, or a sleep, or a joke, or a girl, may come in between them and it, and then (even if you are a queen) you'll get no more good out of them until they've had their way.
C. S. Lewis