We read in Numbers 13 of how Moses sent twelve men to scout out the Promised Land to see if it was good or bad. Ten of the men came back with what the Bible refers to as "an evil report" (Numbers 13:32). When the twelve scouts returned, they told Moses, "The land is good, but there are giants in it!"
The fear of the giants prevented God's people from entering the land that He had promised to give them. It wasn't really the giants that defeated these people; it was their poor self-image. They only saw the giants; they failed to see God.
Joshua and Caleb were the only ones who had a proper attitude toward the land. They said to Moses and the people. "Let us go up at once and possess it; we are well able to conquer it" (Numbers 13:30). In the end, they were the only ones who were allowed by God to go into the Promised Land.
God had a glorious future planned for all of the Israelites, but all of them did not enter into that future - only the ones who had a proper attitude toward God and toward themselves.
~ Joyce Meyer, Being The Person God Made You To Be.
There we saw the Nephilim [or giants], the sons of Anak, who come from the giants; and we were in our own sights as grasshoppers, and so we were in their sight. ~ Numbers 13:33