Secondarily devotion is caused as stated (3), by the consideration of one's own failings; for this consideration regards the term from which man withdraws by the movement of his devout will, in that he trusts not in himself, but subjects himself to God. Secundario vero causatur devotio, ut dictum est, ex consideratione propriorum defectuum : nam haec consideration pertinet ad terminum a quo homo per motum voluntatis devotae recedit, ut scilicet non in se existat, sed Deo se subdat.

Difference between "existing in oneself" and "trusting in oneself" and giving oneself under to God. "Existing in oneself" means there is a lot more possibility - "trusting in oneself" means that one turns to "Trust in God"- "existing in oneself" means that one turns to "exist in God". I think it'd be important to meditate on this difference.