It's a landmark for a young child to count to 100; it sort of covers all the "ordinary" numbers. One hundred is obviously significant for other groupings: 100 cents is a dollar; 100 yards is a touchdown; 100 years is a century, and the landmark for a very long life. It makes sense, then, that in the Bible, 100 represents fullness or a state of completion, or in some instances simply "much." For instance, people marvel that Abraham had Isaac when he was 100 years old; the number represents the point at which the Lord, when growing up as Jesus, united the human elements of himself with the divine elements and in a sense became "complete.

888. Verse 12 And he waited yet another seven days and sent out the dove, and it did not come back to him any more.

'He waited yet another seven days' means the beginning of the third state, 'seven days' meaning that which is holy. 'And he sent out the dove' means a state of receiving the goods and truths of faith. 'The dove did not come back to him any more' means a state of freedom.