Walking represents living, and usually means living according to the true things taught to us by the Lord -- to "walk in His ways." When the Lord is pictured walking, it means life itself.

2717. 'And his mother took for him' means the affection for truth. This is clear from the meaning of 'mother' as the Church, dealt with in 289. And because the spiritual Church which is represented here is governed by the affection for truth, and it is this affection which makes it a Church, 'mother' here therefore means that affection.