The Ramban asks a poignant question at the start of our sedra.
Whereas the Torah gives some background info about virtually all other tzadikim, when it comes to Avraham we are simple told ‘HaShem spoke to Avraham saying…’ Where’s the introduction as to who Avraham was?
The Sefas Emes used to cite this question often, giving a new answer almost every year. One year he answered using the Zohar, remarking that ‘HaShem called out to everyone. But Avraham was the only one who listened.’ The idea is that HaShem is constantly telling us messages; whether via nature, current events, or personal happenings in our own lives. We just need to make sure that we are on the right (spiritual) wavelength to be able to tune into these messages.