Elaine Lowry Brye's four children are all officers in the U.S. military, one each in the Army, Navy, Air Force and Marine Corps.

Now, she's sharing the wisdom she's learned as a military mom of four in the new book "Be Safe, Love Mom: A Military Mom's Stories of Courage, Comfort, and Surviving Life on the Home Front."

Brye appeared on "Fox and Friends Weekend" to explain what compelled her to write the book and also to share some valuable lessons, including "learn to let go."

"That's the first thing. When we say goodbye to our children, we're letting them go, not just to say goodbye to them for a temporary time, but they may be going away and never returning, because they may possibly be going into harm's way," Brye explained. "We never know. It's a phone call away."

Brye recommended that parents trust in their children and in their military training.

"When we try to control our children and when we try to do too much for them, we really are stopping them from becoming who they really can be," Brye said.

She added that of course it can be very difficult, so she helps cope by praying, knitting and running.

Another piece of advice for military moms - or any parent, for that matter - is that life is not over when your kids leave home, Brye added.

"I hope people will go out and think of this as a training manual for military moms, but also how to move past the empty nest experience."

Watch more in the "Fox and Friends Weekend" clip above and be sure to pick up "Be Safe, Love Mom."

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