optimism
n[U]
tendency to expect the best in all things; confidence in success; belief that good will triumph over evil in the end 乐观; 乐观主义
He was still full of optimism for the future despite his many problems. 他尽管有许多问题, 但对未来仍十分乐观.
There was a feeling of optimism in the country when the new government was elected. 经选举产生新政府, 举国上下对前景十分乐观. Cf 参看 pessimism.
So, celebrate your success, and invite your parents to celebrate with you, however hard it may be for them. If you continue to be excited about your future, you may come to educate your parents in the same way.