This author also draws attention to the link between what goes on in our bodies and what goes on in our manifestations of spirituality. She prays less, is less kind, is less patient, when she is tired, unhealthy, and overbooked. Shocking, I know. But it's good to relate that time and again.
Overbooking is a temporal manifestation of an artificial system. We try to do too much because we've labeled it "important". Is the world REALLY going to end if we don't go to this party, or buy that gift? Probably not.
Meditation is doing something. Prayer is doing something. It is trying to contact the divine, to rest this material form, and bring that divine energy down into the world. Recharge. Refresh. Renew.