One element in the harmony of faith and reason is that it is sometimes right and sometimes wrong to seek reasons for faith. One sense of reason is to verify for ourselves, the primary sense of faith is trust in another, and faith that we only seek to verify is not faith at all. This sense of faith is one that will pass away in the eschaton.
But even this involves qualification. Beatitude is better understood as an overcoming of the opposition between self and other. The blessed do not see God by having an idea of him but by having God himself. If physics sufficed for human happiness, beatitude would consist in becoming the laws of nature while remaining oneself.