Happy 40th birthday to you, my greatest love. Our love conquers all. And always will.

In life, the possibilities are endless. The only limitations are those that life inside your mind. Go forth, happy birthday.

Happy birthday to someone who is still alive and kicking! You really have to stop kicking everyone. You're 40, for goodness sake.

Happy 40th birthday. We hope that you can blow out all 40 birthday candles on your cake before we need to call the fire department.

Every crisis has an opportunity in disguise. For all you know, your midlife crisis may also have a brilliant opportunity for you in store. So stop sulking about turning forty and let’s party. Happy birthday.

Happy 40th birthday. At this age, if you feel old, you may be right.

Life is short. Now that you're 40, it's even shorter. Happy 40th birthday!

Congratulations for turning forty. The average life expectancy is about 80 years so you have lived half of your life already. Sorry for being the party pooper, but facts are facts! Happy birthday.

Happy 40th birthday! Loving you is my purpose in life. I'm here to love you every day, every night, for eternity.

FORTY – Flirty, Optimistic, Risky, Teasing and Youthful. This is the secret to feeling young even when you are forty years old. Happy birthday.

Turning forty is all about reaching some of life’s peaks… including the peak of midlife crises, peak of your kids’ teeny tantrums, peak of marital issues and peak of problems at work. Good luck!

Happy 40th birthday! The easiest thing I've done in my life was falling deeply in love with you. The best thing? Loving you every day.

Turning forty is a wakeup call – life is running away and the only way to catch up is to live the best life you possibly can. Happy 40th.

Happy 40th birthday! You are more than my soulmate. You are my best friend, confidant, partner and savior. My life without you would be devoid of all the love we share.

Happy 40th birthday! You are love. Love is you. I love you. You love me. Our world is full of love, and always will be.

Life’s milestones aren’t supposed to be counted… they’re supposed to be celebrated. Happy 40th.

Happy 40th birthday! My life is heaven on earth with you in my world. Let's make your big day as heavenly as you are, my angel.

Happy 40th birthday! You are beauty personified. Everything about exudes beauty, from your soul to your heart. Our life is beautiful because of you.

Your genes and DNA should be bottled up and preserved because you seem to be getting younger with every passing year. Happy 40th.