In many verses in the Old Testament it says that God helps those that trust in Him. הבוטחים בהשם כהר ציון לא ימוט לעולם.(Those that trust in God are like Mount Zion which will never be moved ) והבוטח בהשם חסד יסובבנו(He who trusts in God, kindness will surround him.).ברוך הגבר אשר יבטח בהשם (Blessed is he who trusts in God) and that last verse in Jeramiah goes into the benefits that are gained by one who trust in God. There does not seem to be any argument about if one is required also to do השתדלות (effort) also or not. For both to Ibn Pakuda [Obligations of the Hearts] and the Gra, effort is not necessary. [There is however a difference. To Ibn Pakuda, effort is not needed for one who accepts on himself the yoke of the service of God. To the Gra effort is not needed at all. One is decreed to come to you, will come whether you like it or not.]