Easter inspires the mind and warms the heart, because sin and death did their worst and have been conquered. You and I have the guarantee of victory over both sin and the grave.
Christians know there is a continual struggle dealing with sin and self.
Sin keeps us from God, and self reinforces it. We live as we want and are not too concerned about God's will. We sin by choice and it controls according to the pleasure we have in it. We may not feel it is wrong and even identify what we want as what God would have for us. Christianity is about victory over sin and is a death to self.