What I have always meant by this, and what we have learned over and over again as parents, is that if for any reason you can't trust yourself in the eduction of your children, there is a way to trust that your children will still learn.
You may not be at your best always; there may be others who can explain better; and there will always be those whose own self doubt turns into promoting self doubt inside you.
In the face of all of this and more, you can trust your children to learn. Focus on creating the environment that fuels their native curiosity. Kids who are not dumbed down by a "telling is learning" anesthetic, can be supercharged learners by following their own natural tendencies and interests in a nurturing, inquisitive and "supportive of curiosity" environment.
When we finally realize that we have been conditioned to believe that "instructionist" education is the only trustable education when other more productive approaches have always been available, then we can make a space in our hearts, to "trust the children" even if we don't trust ourselves always.
It is this unquenchable trust in the souls of young children that allows me to hope, in a world that is increasingly hostile to virtue, innocence and the power of purity.
I trust my children to learn much more than my ability to teach. To learn by their own daily experience as living human beings possessing agency all their own, is how it was meant to be for the most part, mixed in with a little "teaching is telling" for good measure.
The more I learn about learning, I become more convinced of the power of freedom, curiosity and good environment creators.