In his homily, our presider pointed out that although there are multiple gates, there are--in fact--gates to heaven that are guarded by angels. The condition for entry is laid out in today's Gospel when Jesus says, "Whoever loves me will keep my word, and my Father will love him, and we will come to him and make our dwelling in him." Basically, He says that we need to keep true to His teachings if we love Him. That love is what will save us in the end.
And what are those teachings? To love God and to love one another. He already laid out what He meant by "love." It means to listen, to trust, and to be true. It means to keep His word--to do so, we must be true to our own words and act in loving ways.