The kingdom of heaven is like a grain of mustard seed.
Mt.13:31
With the Holy Spirit involved small beginnings are assured of large outcomes.
I recall with gratitude a seed of faith planted in my life at a time when there wasn't much soil to nourish it. A Presbyterian minister would come into my primary school class room once a week to talk about things of God.
I remember nothing of what he said but I do remember what he was like. There was something authentic about him and... kindly. Even as a child I could tell he believed in what he was saying and that he lived it out.
I came from a home with no active faith life so that seed remained dormant for decades until it was fed and watered by someone else. But that is another story.
My wife and I lead children's liturgy in our parish. We focus on the Gospel reading but I'm reminded here of what is important. When I'm white hot for Jesus and excited about being Catholic, seeds are planted.
Come Holy Spirit, fill the hearts of your faithful. Kindle in them the fire of your love and they shall be created and you shall renew the face of the earth.