मानुषं नयापनयौ दैवमयानयौ ॥ कZ_०६.२.०६ ॥
mānuṣaṃ nayāpanayau daivamayānayau
Human factors are sound policy and faulty policy; fate consists of favorable and unfavorable chance.
Separate what is controllable (policy quality) from what is uncontrollable (chance), so responsibility is assigned correctly and planning becomes realistic.