YSK: There is nothing wrong with reminiscing and being proud of yourself but don't get addicted or too comfortable with seeking a lot of gratification from past accomplishments or good experiences. It might prevent you from making new accomplishments and good experiences.
from /r/YouShouldKnow
YSK：回忆和为自己感到骄傲没有错，但不要沉迷于或过于舒适地从过去的成就或良好的经历中寻求大量的满足感。这可能会妨碍你取得新的成就和好的经验。