क्षणशः कणश्चैव विद्याम् अर्थ च साध्येत् ।
क्षणे नष्टे कुतो विद्या कणे नष्टे कुतो धनम् ॥
One must give a lot of importance to every second (with respect to time) and every grain of cereals. If you lose seconds how will one get educated. If you lose grains, how will you gain wealth.