The System of the Vedanta according to Badarayana's Brahma-Sutras and Cankara's Commentary c7.s5.t2.5

c7.s5.t2.5

Sour milk comes only from milk, never from clay; while jars come only from clay, not from milk. This could not be so, if the effect did not exist before its manifestation; rather, in that case, anything could arise out of anything. But there lies in the cause a certain extension beyond itself (*kaçcid atiçayaḥ*) towards the given effect--as of milk to sour milk, and of clay to the jar; and this forbids our regarding the effect as non-existent before its manifestation. For each cause has its peculiar power (*çakti*) and this power brings the given effect into manifestation, and no other. Therefore we may not regard cause and effect, substance and qualities, as different, like horses and oxen, but must regard them as of like nature (p. 461, 3--462, 5).