'equilibrium, balance, or harmony of abilities', relates to the 5 spiritual abilities:

• faith,

• energy,

• mindfulness,

• concentration and

• wisdom (s. indriya 15-19).

Of these there are two pairs of abilities, in each of which both abilities should well counter-balance each other, namely: faith and wisdom (saddhā, paññā, q.v.) on the one hand and energy and concentration (viriya, samādhi, q.v.) on the other.

For excessive faith with deficient wisdom leads to blind belief, whilst excessive wisdom with deficient faith leads to cunning.

In the same way, great energy with weak concentration leads to restlessness, whilst strong concentration with deficient energy leads to indolence.

Though for both abilities in each of the 2 pairs a balanced degree of intensity is desirable, mindfulness should be allowed to develop to the highest degree of strength. Cf. Vis.M. III- (App.).