God loves man as His prized creation, nevertheless man is filled with deceit and wickedness towards it's Creator and fellow human beings. To exemplify His love for man, God introduced the Ark of Salvation through Noah, as a design to redeem man from perdition and self-destruction.
The
"Ark of Noah" as it is well known, was the Ark of Salvation that was
built then to save the world, but unfortunately only Noah and his
family, and some animals were saved from the great flood that ravaged
the earth. If God could save animals then, how much more would He be
ready to save man again from the impending doom that will soon come upon
the world.
In the spiritual
realm, the "Ark of Salvation" points to Jesus Christ, the ultimate
Saviour of Mankind in the past, present and the future. For Jesus Christ
is the beloved Son of God, His Word and also personifies His
everlasting Love for Mankind. 
Importantly,
when one ponders on man's relationship with God from Genesis to
Revelation, it becomes apparent why there is a need for Salvation, and
how this will be obtained through Jesus Christ. For instance, in the
time of Noah we read how the human race became degenerate (in Genesis
6).