to be performing at one’s best level
être au meilleur de sa forme (etre au meilleur de sa forme)
"The athlete is at the top of his game this season."
"L'athlète est au sommet de son jeu cette saison." (L'athlete est au sommet de son jeu cette saison.)
to balance between two difficult choices or opposing sides
Long-time friends are more valuable than new ones.
to make a noticeable difference or impact
to succeed or fail by your own efforts
to start a friendly conversation in an awkward situation
Completely honest and without fault.