Language is the blood of the soul into which thoughts run and out of which they grow.

The metaphor casts language as a life-sustaining medium: thoughts do not merely get “expressed” in words but circulate through language and are shaped by it, much as blood both carries nutrients and enables growth. Read this way, the line argues that vocabulary, syntax, and shared linguistic habits condition what can be conceived, refined, and communicated. It also implies a feedback loop: ideas flow into language (taking form), and then, once articulated, they develop further—through revision, dialogue, and interpretation—into more complex thought. The image underscores the intimate dependence of inner life and public discourse on the vitality and precision of language.