You cannot prevent the birds from flying in the air over your head, but you can certainly prevent them from building a nest in your hair.
Martin Luther1
Bird in hair
Finally, brothers, whatever is true, whatever is honorable, whatever is just, whatever is pure, whatever is lovely, whatever is commendable, if there is any excellence, if there is anything worthy of praise, think about these things. What you have learned and received and heard and seen in me—practice these things, and the God of peace will be with you. Philippians 4:8-9 ESV
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1 Martin Luther and Edwald Martin Plass. What Luther Says: An Anthology, Volume 3. Concordia Publishing House, 1959. Page 1344O