'Least' in the Bible

"For I tell you, among those who are born of women there is not a greater prophet than John the Baptizer, yet he who is least in the Kingdom of God is greater than he."

and said to them, "Whoever receives this little child in my name receives me. Whoever receives me receives him who sent me. For whoever is least among you all, this one will be great."

If then you aren't able to do even the least things, why are you anxious about the rest?

But Jesus answered, "Let me at least do this" -- and he touched his ear, and healed him.