Full Idea
For Kant understanding essentially involves singular elements (and reason is essentially general).
Gist of Idea
Understanding essentially involves singular elements
Source
report of Immanuel Kant (Critique of Pure Reason [1781]) by Tyler Burge - Frege on Apriority (with ps) 3
Book Reference
Burge,Tyler: 'Truth, Thought, Reason (on Frege)' [OUP 2001], p.373