I haven't felt too well for the last couple of days, and I don't have the energy to talk.

This explains why pandas also evolved a sluggish, energy-conserving lifestyle.

Breakfast brings those blood sugar levels back up to normal, and helps our bodies wake up so we don't feel sluggish.

It's the most common thing in the world (besides bacteria) - the honest and fervent desire for self-improvement, followed by inaction or giving in to temptations, followed by guilt or giving up.