Suffer from scruples…

We may conclude that persons who suffer from scruples are the most favored by divine love, and the most certain of reaching Heaven when they bear this trial in patience and humility. Scrupulous souls die continually, they suffer a perpetual purgatory, and so they leave the earth to fly to Heaven purified and free from sins to expiate.
–Blessed Henry Suso (c. 1295-1366)

Scruples hinder…

Scruples, too…  hinder devotion; for they are like thorns which prick the conscience and diquiet it, and will not allow it to find repose and comfort in God.
— Saint Peter of Alcantara (1499-1562)