They never grieve for what is yet to come. They are concerned with only what is present and act as they should. They never grieve for the past or even recollect it.
नाप्राप्तमनुशोचन्ति प्राप्तकालानि कुर्वते। न चातीतानि शोचन्ति न चैव प्रतिजानते॥