The full quote from Santayanna:
Progress, far from consisting in change, depends on retentiveness. When change is absolute there remains no being to improve and no direction is set for possible improvement: and when experience is not retained, as among savages, infancy is perpetual. Those who cannot remember the past are condemned to repeat it.
Our Lord said:
Isaiah 43
18 Remember ye not the former things, neither consider the things of old.
19 Behold, I will do a new thing; now it shall spring forth; shall ye not know it? I will even make a way in the wilderness, and rivers in the desert.
20 The beast of the field shall honour me, the dragons and the owls: because I give waters in the wilderness, and rivers in the desert, to give drink to my people, my chosen.
21 This people have I formed for myself; they shall shew forth my praise.
22 But thou hast not called upon me, O Jacob; but thou hast been weary of me, O Israel.
Both are important statement about one's mind set on the past, and future, but the latter should out weigh the former.
Getting over the past is NOT ignoring, the lesson it taught.