I admit to having slipped up in two or three instances. However, it's unknown why my entire life is disgraced.

This couplet beautifully expresses a common human sentiment. The poet honestly admits that they too have made a few mistakes or 'slips' in their life, openly acknowledging these isolated incidents. However, the poignant and puzzling part is their confusion and sorrow over why, despite these being just a couple of errors, their entire life and reputation have been unfairly stained or defamed. It's a powerful reflection on how a few minor missteps can sometimes disproportionately overshadow a whole lifetime, leading to undeserved blame and a lasting tarnished image, questioning the fairness of judgment.