Live in the present

गते शोको न कर्तव्यः
भविष्यं नैव चिन्तयेत् ।
वर्तमानेन कालेन
वर्तयन्ति विचक्षणाः ॥

- चाणक्यनीतिः

Past should not be repented for. Future should never be worried about. Wise men act in the present.

Live in the present.
Yesterday is history. Tomorrow is a mystery. Today is a gift, that's why it is called the present.
A good well-lived today makes every yesterday a dream of a good future, and every morning a vision of hope.