["Do" has a spiritual dimension:
it is the path without end]
When standing in guard, the human body has two points of balance and two points of imbalance (one before oneself, one behind oneself).
Attacking (coming to grab, hit, cut) implies moving. Moving implies liberating one's foothold, or, in martial arts, gliding on very soft footholds. When attacking, in the space of a heartbeat, one's foothold vanishes. Attacking is putting one's imbalance in motion.
To pin or throw the attacker to the ground
By positioning oneself right, one amplifies the direction of the attacker's strength (or movement) into the attacker's imbalance. The attacker provides all the power, which works against them.
This is why
aikido is practiced
by women and men of every age
at their own pace
and care of the other
true victory is
victory over oneself
Masakatsu Agatsu/Morihei (« True victory is victory over oneself, [signed] Morihei » (The Essence of Aikido, Budo Edition)
so, why not you?
there is no competition in Aikido