Full Idea
Abstract identity (which is what here is also called 'concept') and being are the two moments that reason seeks to unify; this unification is the Ideal of reason.
Gist of Idea
The ideal of reason is the unification of abstract identity (or 'concept') and being
Source
Georg W.F.Hegel (Logic (Encyclopedia I) [1817], §49)
Book Reference
Hegel,Georg W.F.: 'The Hegel Reader', ed/tr. Houlgate,Stephen [Blackwell 1998], p.161
A Reaction
Not sure I understand this, but I connect it to Aristotle's approach to the problem of being, which was to abandon the head-on approach, and aim to understand the identities of particulars and kinds.