“See that you do not despise one of these
little ones, for I say to you that their angels in heaven always look upon the
face of my heavenly Father.”
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Therefore, to straighten out things and to tell the disciples that self-seeking individuals would not be the greatest in the kingdom of heaven. Jesus told them; “Amen, I say to you, unless you turn and become like children, you will not enter the Kingdom of heaven. Whoever humbles himself like this child is the greatest in the Kingdom of heaven (Matthew 18:3-4).
The Kingdom of Heaven is reserved for the humble only for we cannot go to heaven by our own effort. And we cannot go to heaven without the mercy of God. Therefore, children are not only perfect models of humility they are also perfect examples for their reliance on their parents. Could children exist by themselves? No they can't exist by themselves they need their parents to be with them to survive.
In like manner the disciples can’t rely on themselves they have to rely on God rather than on themselves. This was perhaps one of the salient point of Jesus when He called the child to their midst (Matthew 18:2).
This also applies to all of us, we cannot rely on our riches (If ever we have riches) no matter how presently rich we are. We cannot rely on our power as well no matter how presently powerful we are for all of these are creation of this world that could evaporate from our hands anytime.
So, to whom are we going to rely? We rely
on God alone. - Marino J. Dasmarinas