Essigsäure - Ameisensäure - Kleesäure
In his writing on natural science and in his lectures Rudolf Steiner frequently referred to certain substances in unusual terms. Matter is understood as a consequence of processes instead of their cause. Thus, they manifest imprints of higher forces and beings in well defined points in space and in specific forms and densities. Here, substances can be isolated with properties reminiscent of their origin. It seems that certain processes of life on the earth can only be realised in suitable material, constituted accordingly and allowing for continuing motion.
Steiner’s descriptions relating to formic acid, oxalic acid and aric acid are especially marked. Why are all of them acids and why do they all belong to the same mutual category, what distinguishes each of them? We must envisage a broad background of natural history that is alive in these substances in order to gain a complete picture of their distinct impulses.