Conditioned and Unconditioned Noble Truths

The introduction of two kinds of noble truths indicates that the elimination of defilement by the three vehicles is only partial. Consequently, their spiritual realization is only Nirvāṇa with remainder. Their understanding of the noble truths is only conditioned, and not the ultimate wisdom of the unconditioned, which belongs only to the Buddha.

Among the conditioned and unconditioned noble truths, only one truth is the supreme truth, viz. the one unconditioned noble truth of the extinction of suffering, all other truths being implied and serving as means to comprehending the unconditioned. The extinction of suffering is identical with the elimination of beginningless ignorance, the last distinct characteristic which differentiates the mind of the Buddha from that of living beings.

The Buddhist Feminine Ideal, p123