Often when I see the plan of salvation blocked out on a chalk board it is represented as the middle block of three equally sized chunks like this--with 1 being our pre-mortal life, 2 our mortal existence, and 3 our post-mortal eternity:
[ 1 ]
[ 2 ]
[ 3 ]
Granted, it is hard to draw or conceive of something that stretches forever in the past and forever into the future, but I think the following lone period below is a slightly more accurate way of viewing this life. If you imagine that everthing in front on the other side of your screen extending foward infinitely is the future, and everthing on this side of the screen extending behind you is the eternal past, then I think you can put in perspective the length of our mortal lives.
.
Sometimes when I feel discouraged about life, I like to think of this image and be calm and realize that we all have an abundance of time and space if we realize it is there.