God calls us to 'make every effort' to add to our faith qualities which will make our faith effective in our day to day lives. Part of this is using our willpower to build positive habits which will align our lives with what God has already done for us. Some habits (patterns of behaviour) are more powerful than others in shaping our lives, keystone habits such as prayer, engaging Scripture and being connected in community with other believers.
The first followers of Jesus didn't believe in the resurrection as an idea, but as an event they had witnessed. Jesus' resurrection was not only the fulfillment of His promise to rise from the dead, but God's promises about the Messiah who would come to rescue humanity from sin and death and for a life of holiness with Him. How do we respond appropriately to this event? Live out our faith by making every effort we can to walk in God's promises to us, cooperating with what God has already done in and for us.
Knowing our identity in Christ and personal vision from God isn’t enough to see these made manifest in our lives. It also requires our taking steps to live these out. Good intentions will not get us to the positive destinations we want in our life. Following Jesus requires effort on our part to turn our intentions into steps that will lead us in the direction of His Kingdom.