Never Finished Climbing
A person who thinks of himself as a finished tzaddik has already slipped, while one who sees himself as only beginning keeps rising without end.
"These are the offspring of Noach: Noach was a righteous man." The Noam Elimelech reads this as a warning. When a person thinks of himself as a tzaddik, that very thought makes him fall from his level, even if he truly was one. But a person who feels he has not yet done his duty, who sees himself as only an image of what service of Hashem should be, stands firm and keeps rising, and Hashem supports him and satisfies him with higher and higher levels without end. This is the hint in "offspring": if you tell yourself, I am Noach, a righteous and wholehearted man, you are still only an offspring, standing in place of the father, and not yet at the root of avodah (the service of Hashem). The Rebbe finds the same idea in Dovid HaMelech's words, "I shall be satisfied, when I awake, with Your image."
Source: Noam Elimelech, Bereishis, Noach (on Bereishis 6:9 and Tehillim 17:15)
Think of an area where you feel you are already doing well: your davening, your chessed, your learning. Instead of resting there, ask quietly what the next step would be. Before Shemoneh Esrei tomorrow, say to Hashem in your own words: I have not yet arrived; help me go a little higher. Then pick one small improvement and try it. Feeling like a beginner is not a failure. It is what keeps a person climbing.