Gemara Taanit 21b- conversation between R Nachman b Yitzchak and R Nachman bR Chisda highlights the appropriate perspective regarding knowing ones worth while remaining humble.

1 section- debates in various cases regarding prep necessary from before Shabbos to avoid issues of use on Shabbos for vines, shutters, bolts, etc. and psak

1 section- debates in various cases regarding prep necessary from before Shabbat to avoid issues of use on Shabbat for shutters, bolts, etc. and psak

It is not enough to affirm out reliance on Hashem, but rather to develop it in a real way. This potential lacking becomes evident in times of challenge.

Based on previous teachings, one cannot rely on his own efforts as he doesn't even know if it will yield benefit or not.

1 section- moving shredded reeds (from mats), remnants of talis, and pieces of old oven (mach RM/RY)

Further illustrations of the idea that extra hishtadlus can have adverse results and importance to perform medical directive as a mitzva.

1 section- debate regarding moving pieces of broken vessels (with some remaining function) on Shabbos and related halachos

1 section- debate regarding moving broken vessels (with some remaining function) on Shabbat and related halachot