When God calls us to do something He automatically equips us to do it. God will call us to do tough things but He will never call us to attempt something that, together, we will not succeed in.
Sometimes God calls us away from situations that He once called us to! It takes strength and wisdom to walk away. Lord grant us that strength and wisdom in such situations! Help us to leave in the best possible way. Help us to know for sure that it is Your will!