Even though it's late at night, Twilight Sparkle is wide awake and immersed in her... Let's call it work. That is, until a certain earth pony shows up, with a big problem on her hooves.

Warning: Contains some spoilers from episode 19: Putting your Hoof down

Note: As you may have already guessed this is TwiPie fic, but not really a romantic shipping fic (hence no romance tag). It still is a teeny-tiny itty-bitty shippish. Not the “OMG, let's make out and have some magical babies” shippish. Not even “I love her, and she doesn't notice it, sob, sob” shippish. More like “There is some really good air between them, that could lead to future developments, but neither of them notice it yet” shippish. Really, really mild. Or so I think...
But just in case there is someone who absolutely hate anything – and I mean anything – even vaguely considered a ship I'm putting this warning here.

Twilight Sparkle and her fellow Elements of Harmony have faced down supernatural foes of the highest order, but sometimes the deadliest danger can come from places one would least expect. As Twilight is forced to bear a devastating secret, her efforts to keep the Elements together may well tear them all apart.
The plotline of the thrilling Pony Psychology Series continues with an exploration of deception, despair and Discord.
This series takes place between Season Two and Season Three.
Secrets and Lies shares the Pony Psychology Series TVTropes page.

Twilight Sparkle is called away to tend to Luna when she falls ill. As Luna grows sicker and Twilight more determined to help the younger princess, she begins to uncover dark secrets about the elements, the alicorns, and her own past.

"Would you tell anypony if you knew the world was going to end, Twilight Sparkle?"

My name is Canvas. I remember because I wrote it in the corner of the white box. It takes twelve steps to get from the cot to the wall. And the lights hurt my eyes.

(Note: The story isn't in color because I decided to try this without the gimmick! But I still recommend reading the GDocs version.)

There's a new colt in town who's fallen head over hooves for Sweetie Belle -- now, if only he could overcome his shyness and confess his true feelings to her! Sometimes, however, all it takes is a little help from the most unlikely pony imaginable. Somepony he thought he had lost forever...

Five stars on Equestria Daily!

For one who does not count their lives in years or decades, regret can become an almost unbearable burden.

Featured on EQD February 27, 2012

A choice. A choice made eons ago... and the consequences still eons ahead. Comforted by the presence of Princess Celestia, Spike reflects on the bittersweet memories of his friends, their lives and their passing. As he recalls the decision he made in countless ages past, the gentle dragon can't help but wonder... "Might I have been better off?"

One by one, Twilight and her friends must come to terms with the consequences of being the Elements of Harmony.

These stories take place in the intervening time between Season One and Season Two,
with the exception of Ditzy Doo: Muffins, which takes place early in Season One.

The series continues in the sequel, Secrets and Lies.

Pony Psychology has a TV Tropes Page.

Pinkie Pie's unrequited love for Rainbow Dash reaches crisis point as she fears the party in her heart has at long last come to an end.

Illustration by the awesome Mogasaki/Swaetshrit.