My understanding of what Casey is saying goes hand-in-hand with the Buddhist principle of mindfulness.
The following comes from Thich Nhat Hanh:
In Buddhism, our effort is to practice mindfulness in each moment- to know what is going on within and all around us. When the Buddha was asked, "Sir, what do you and your monks practice?" he replied, "We sit, we walk, and we eat." The questioner continued, "But sir, everyone sits, talks, and eats," and the Buddha told him, "When we sit, we know we are sitting. When we walk, we know we are walking. When we eat, we know we are eating." Most of the time, we are lost in the past or carried away by future projects or concerns. When we are mindful, touching deeply the present moment, we can see and listen deeply, and the fruits are always understanding, acceptance, love, and the desire to relieve suffering and bring joy.
I think we can apply this to aikido. When we are giving aikido our full attention, we can notice not just that we are doing techniques correctly or incorrectly, but also that we are forming friendships, overcoming our fears, and learning new things about ourselves.