510. Verse 11. And after three days and a half the spirit of life from God entered into them, and they stood upon their feet, signifies that these two essentials of the New Church, at the end of the former, when the New Church is beginning and progressing, are vivified by the Lord with those who receive them. By "three days and a half" is signified to the end and the beginning (n. 505), thus from the end of the present church to the beginning of the New, in this case, with those among whom the New Church begins and progresses, because it is now said of "the witnesses," that "the spirit of life entered into them, and they stood upon their feet." By "the spirit of life from God" is signified spiritual life; and by "standing upon their feet" is signified natural life agreeing with spiritual life, and thus vivification from the Lord. The reason why this is signified, is, because by "the spirit of life" is meant the internal of man, which is called the internal man, which, considered in itself, is spiritual, for the spirit of man thinks and wills, and to think and will in itself is spiritual. By "standing upon their feet" is signified the external of man, which is called the external man, which is in itself natural; for the body speaks and acts what its spirit thinks and wills, and to speak and to act is natural; that feet signify things natural, may be seen (n. 49, 468).
 What is specifically meant by this expression, shall be explained: Every man who is reformed, is first reformed as to the internal man, and afterwards as to the external. The internal man is not reformed by merely knowing and understanding the truths and goods by which man is saved, but by willing and loving them; but the external man, by speaking and doing the things which the internal man wills and loves, and, in proportion as this takes place, in the same proportion man is regenerated. The reason why he is not regenerated before, is, because his internal is not before in the effect, but only in the cause, and, unless the cause be in the effect, it is dissipated. It is like a house built upon ice, which sinks to the bottom when the ice is melted by the sun; in a word, it is like a man without feet to stand and walk upon. It is the same with the internal or spiritual man, if it is not founded on the external or natural man. Such then is the signification of "the two witnesses standing upon their feet after the spirit from God entered into them"; and also of similar expressions in Ezekiel:
Jehovah said unto me, Prophesy unto the wind, and when I prophesied, the spirit entered into them, and they stood upon their feet (Ezek. 37:9-10).
In the same:
A voice speaking unto me, said, Son of man, stand upon thy feet; and the spirit entered into me and stood me upon my feet (Ezek. 2:1-2).
And in the same:
I fell on my face, then the spirit entered into me, and set me upon my feet (Ezek. 3:23-24).
This is what is meant also by the Lord's words to Peter:
Peter said, Thou shalt not wash my feet only, but also my hands and my head. Jesus said to him, He that is washed needeth not save to wash his feet, and the whole is clean (John 13:9-10).