Do not decieve yourself.

For by the grace given me I say to every one of you: Do not think of yourself more highly than you ought, but rather think of yourself with sober judgment, in accordance with the measure of faith God has given you. Rom 12:3

The Scriptures describe that joy in the Lord which accompanies the witness of his Spirit, as a humble joy: a joy that abases to the dust, that makes a pardoned sinner cry out. "I am vile! What am I or my father's house? Now mine eye seeth thee. I abhor myself in dust and ashes!" And wherever lowliness is there is meekness, patience, gentleness, long-suffering. There is a soft, yielding spirit: a mildness and sweetness, a tenderness of soul, which words cannot express.

But do these fruits attend that supposed testimony of the Spirit in a presumptuous man? Just the reverse. The more confident he is of the favor of God. the more is he lifted up: the more does he exalt himself: the more haughty and assuming is his whole behavior. The stronger witness he imagines himself to have, the more overbearing is he to all around him: the more incapable of receiving any reproof: the more impatient of contradiction. Instead of being more meek, and gentle, and teachable, more "swift to hear, and slow to speak.'* he is more slow to hear, and swift to speak: more unready to learn of any one: more fiery and vehement in his temper, and eager in his conversation. Yea. perhaps, there will sometimes appear a kind of fierceness in his air, his manner of speaking, his whole deportment, as if he were just going to take the matter out of Gods hands, and himself to "devour the adversaries."

John Wesleyan "The Witness of the Spirit"