Stephen Covey, in his famous book the The 7 Habits of Highly Effective People, never said, “When you want to control, stick to what you can control. When you decide to influence, stick to what you can influence.”
He said control what you can control, influence what you can influence.
That means developing a vigilance for tuning your own habitual thoughts and behaviors. It also means choosing to work at the currently farthest reaches of your influence.
When you do what you can, your influence grows. When you do not do what you can, you influence fades. Since influence helps you generate wins for others and yourself, it is a resource to invest in and grow.
In your corner,
PS: Of course you do not have to control or influence whatever you can. I just think it works out better for you and others if you do.