The answer is: He that does the will of my Father

Matthew 7 vs 21

Matthew 7:21 really cuts to the heart of things, doesn’t it? Here, Jesus takes a no-nonsense approach to what it means to be part of the kingdom of heaven. It’s all about 'doing' – turning faith into action! So often, people think that simply saying they believe is enough, but Jesus flips this notion upside down. He emphasizes that heartfelt sincerity must reflect in our actions.

It's interesting how he ties obedience and divine will together. You might recall that in Matthew 12:50, he extends this idea further by stating that whoever does the will of his Father is like family to him. This notion is rampant throughout scripture where obedience often involves social justice and compassion for others – aligning well with various prophetic writings in the Hebrew Bible.

And let’s sprinkle in some captivating trivia! The concept of 'doing God's will' resonates deeply across many cultures and religions—emphasizing themes such as love and ethical living. Also, if you look at ancient Greek philosophy, especially Stoicism, there are echoes of harmonizing one's life with nature or divine reason as a pathway to true happiness.

So while traditionally we might take these calls as rigid rules, when viewed through the lens of love and active kinship—as Jesus suggests—the invitation becomes liberating rather than limiting. Sounds much more inviting for all, don’t you think?