The Upsilon Sigma Phi is the oldest Greek-letter fraternity in the Philippines and the whole of Asia. Founded in 1918, it has a singular and unbroken affiliation with the University of the Philippines, and has no chapters outside the UP campuses in Diliman, Manila and Los Baños.

"On this day we gather to declare that we shall not waver in our efforts to restore UP to its preeminent status in the world of higher education and to ensure that the education it offers is accessible to the least of our people. We must succeed not because we have a reputation to keep but because we have a country to serve."

- Alfredo E. Pascual (July 7, 1948 – ) is the 20th President of the University of the Philippines. He served as Alumni Regent and president of the UP Alumni Association (UPAA) prior to his election as UP President. He was also an official for 19 years of the Asian Development Bank (ADB), the biggest financial institution in Asia. This quote was taken from Making UP a Great University: Investiture Speech of Alfredo E. Pascual.
Source: upsilon.com

"Only when we are vigilant — ready to participate in the public dialogue, militant in the protection of our cherished rights and assertive in the invalid of constructive dissent — will we be able to reverse the downward trend and ensure the ascendancy of a truly democratic and resilient state, a society responsive to the challenges we face."

- Gerardo M. Roxas (August 25, 1924 – April 19, 1982), better known as Gerry Roxas, was representative of the First District of Capiz and Senator. Roxas led the Liberal Party senatorial slate in 1963 and emerged the topnotcher. In 1965, he ran for Vice-President. In the unfinished counting of the abruptly stopped Comelec tabulation, he lost by merely 26,724 votes, the narrowest margin ever recorded in our country’s Vice-Presidential elections. He ran for re-election in the 1969 senatorial elections and emerged as the sole survivor of the entire Liberal Party senatorial slate. As a young congressman, Gerry Roxas established scholarship grants (1958) in Capiz province and later, the nationwide Gerry Roxas Leadership Awards (1968) to motivate and develop the youth’s potentials in leadership and service to country.

"The youth of the Philippines must come forward, even without bidding, for they are and will be needed to invigorate the nation with their fresh vitality, their new ideas, and determination."

- Arturo M. Tolentino (September 19, 1910 – August 2, 2004) was Vice President of the Republic of the Philippines, Senate President, Minister of Foreign Affairs and Member of the House of Representatives, serving as Majority Floor Leader. He is more well known as the father of the Philippine archipelagic doctrine and expert on the Law of the Sea. In UP, he was editor-in-chief of the Philippine Collegian. As a debater and orator, he won seven gold medals (including the Quezon Medal). He held the title of Inter-Collegiate Oratorical Champion of the Philippines in 1934.

"There are many things we do not want about the world. Let us not just mourn them. Let us change them."

- Ferdinand E. Marcos, Sr. (September 11, 1917 – September 28, 1989), was President of the Philippines from 1965 to 1986. He was a lawyer, member of the Philippine House of Representatives and a member of the Philippine Senate. He was Senate President from 1963-1965.

"Stand up now and be a leader! And when all of us are leaders, we will expedite the cause of freedom."

- Benigno “Ninoy” Aquino, Jr. (November 27, 1932 – August 21, 1983) was a Senator and a former Governor of Tarlac. Aquino, together with Gerry Roxas, formed the leadership of the opposition to the Marcos regime in the years leading to the imposition of martial law in the Philippines. In 1973 he was arrested and incarcerated for 7 years, but was allowed to depart for the United States to seek medical treatment after he suffered a heart attack in 1980. He was assassinated at the Manila International Airport upon returning home from exile in the United States in 1983.

"Nothing can make me happier than to die for my country."

- Wenceslao Q. Vinzons (September 28, 1910 — July 15, 1942) was president of the UP Student Council and editor-in-chief of the Philippine Collegian. At 24, he was the youngest delegate of the 1935 Constitutional Convention. In 1940, he was elected governor of Camarines Norte. The following year, he successfully ran for election to the National Assembly, representing the lone district of Camarines Norte. His service in the legislature was interrupted by the Japanese invasion of the Philippines in December 1941. Among the first Filipinos to organize the guerrilla resistance after the Japanese invasion of the Philippines in 1941, he was executed by the Japanese Army.