If you look for the tenses, you come to find that Christ uses the past tense in verse 4 (how oft have I), the present tense or a tense close to that in verse 5 (how oft would I have), and the future tense in verse 6 (how oft will I). To me, this is a way for Christ to say that him and the Father are the same "yesterday, today, and forever." We find this pattern throughout the Book of Mormon and Bible, but it is interesting to see it in this way. These verses show me that Christ will always and always has watched over us.
Now what does that mean for us? It means that we need to make sure we are aware of all of the things Christ has done for us, that he is now doing for us, and that he is yet to do for us. Perhaps these people had forgotten the blessings they had or the opportunities they had been given in life. Perhaps Christ felt as if they would forget if they were not reminded. Regardless, it is our duty to know that Christ is the same now and always will be and that he will always gather us "as a hen gathereth her chickens."