Moses stands before the Israelites, aiming to instill deep confidence as they prepare to enter the Land of Israel. He makes it clear that the path ahead is open and guaranteed by God.
The call to look at what lies ahead is not about physical sight, but rather about careful observation and understanding. Some commentators explain that this understanding is built on the Israelites' past experiences. Having survived a harsh desert filled with snakes, scorpions, and numerous enemies completely unharmed, the people can clearly understand that God truly wants to give them the land [רא״ש, הדר זקנים, בכור שור, ביאור שטיינזלץ]. Alternatively, this sight can be understood on a spiritual level. The promise that the land is placed before them, rather than simply given directly to them, suggests that God has already defeated the spiritual guardian of the Canaanite nations in heaven. Because this heavenly battle is already decided, the land lies before them without dispute [רבנו בחיי, צאינה וראינה].
On a practical level, stating that the land is placed before them implies that it is fully at their disposal, but it now requires their own will and initiative to rise and take it. It is not a completely finished action handed to them without effort [ביאור יש״ר]. Because the path is cleared, they are urged to go up and take possession. This process is compared to receiving an inheritance [אבן עזרא, ביאור יש״ר]. The conquest will be as simple and natural as a child receiving an estate left by a father [העמק דבר]. Everything is already prepared for them [בכור שור], and no one will be able to stand in their way [ספורנו]. This promise is a direct continuation of the original instruction God gave them back at Mount Horeb to come and claim the land [העמק דבר].
Finally, Moses offers a double encouragement. First, he addresses the natural, physical fear of going to war against their enemies [העמק דבר]. Second, he warns them against a deeper, internal breakdown. He urges them not to let their hearts shatter, lose their courage, or fall into despair. Instead, they must approach the coming campaign with complete confidence that the victory is already in their hands [אבן עזרא, רש ר הירש, העמק דבר, ביאור שטיינזלץ].