залогом

Said in one Russian podcast line.

• бы служить вернейшим залогом успеха. Но тот же самый ум может прийти в отчаяние,

  would serve as the most reliable guarantee of success. But the same mind can fall into despair,

  

  Детективные историиТайна Мари Роже, Эдгар По

The shows belong to their publishers, and each line plays from the publisher’s own file. Translations are machine-made. Russian books and courses on Amazon (affiliate link).