"This fact lays on us - so long as the maintenance of good relations with Russia seems to us worth an effort - the duty of satisfying Russia that she has no need to fear any invasion of her sphere of interests on Germany's part"

This quote by Bernhard von Bulow recommends that Germany has a task to make sure that Russia does not feel threatened by any prospective German intrusion of its sphere of interests. This implies that Germany should take actions to maintain excellent relations with Russia, as it is worth the effort. This might consist of diplomatic efforts, such as exchanging ambassadors, signing treaties, and taking part in trade. It could likewise include military efforts, such as lowering the variety of troops stationed near the Russian border and preventing any provocative military workouts. Ultimately, the goal is to show to Russia that it has nothing to fear from Germany, and that Germany is dedicated to maintaining good relations.